CN210376021U - Pneumatic type low-speed impact mechanism for impact test - Google Patents
Pneumatic type low-speed impact mechanism for impact test Download PDFInfo
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- CN210376021U CN210376021U CN201921062785.XU CN201921062785U CN210376021U CN 210376021 U CN210376021 U CN 210376021U CN 201921062785 U CN201921062785 U CN 201921062785U CN 210376021 U CN210376021 U CN 210376021U
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Abstract
The utility model relates to a pneumatic low-speed impact mechanism for impact test, which comprises a connecting cylinder, wherein the end part of the connecting cylinder is fixedly connected with guide rails which are parallel to each other, a cylinder is fixedly arranged in the connecting cylinder, a hammer body of a punching hammer which moves up and down along the guide rails is arranged on the guide rails, one end of the hammer body of the punching hammer is fixedly provided with a hammer head of the punching hammer, the other end of the hammer body of the punching hammer is fixedly provided with a clamping column, and the clamping column is hooked or separated with a buckle structure at the end part of a pneumatic action rod; the secondary impact prevention mechanical structure can effectively capture a punch hammer rebounded by impact and prevent secondary impact on a test piece; the linear displacement sensor is connected with the impact hammer, so that a displacement signal of the impact hammer in the whole impact process can be acquired, and the signal can be acquired, stored and processed through the data acquisition system, so that a speed curve of the impact process can be acquired, and accurate speed measurement in the impact process can be realized; the impact speed, namely the impact energy can be adjusted according to the air pressure value of the control air cylinder by using the air cylinder as the driving power.
Description
Technical Field
The utility model relates to an impact test technical field especially relates to a pneumatic type low-speed impact mechanism that impact test used.
Background
Composite materials are more and more widely applied in the fields of aviation and civil industry, parts of the composite materials are inevitably subjected to impact damage in the manufacturing and using processes, and the composite materials are sensitive to the impact damage and easily cause the defects of layering, cracking and the like, so that the performances of the materials and the structures are reduced. Therefore, in structural design and engineering application research, performance tests are generally performed after impact damage is introduced to a material or a structure.
In the field of aeronautics, there are generally two types of impact damage introduced: the small mass punch impacts at high speed or the large mass punch impacts at low speed. With regard to low-speed impact of a high-mass impact hammer, a bench type impact tester is generally used for prefabricating impact damage, but a test piece must be placed in a test space of the impact tester, and the impact damage cannot be introduced at a structural part test site. The portable low-speed impact testing machine who has now has drop hammer or spring etc. but has some shortcomings: impact at any angle cannot be carried out, so that damage cannot be prefabricated at any position of the structure; the impact energy range of the single impact hammer is smaller; the structure is not light enough, and the like.
Impact testers are usually equipped with a speed measuring device to evaluate the impact energy. The conventional speed measuring device of an impact tester generally measures the time t required for a punch hammer to pass through a fixed distance s according to the speed measuring principle, and then calculates the average speed vmConsider the average velocity v as s/tmI.e. the mean velocity v of the instantaneous velocity of the impact hammer at the surface of the test specimenmInstead of the instantaneous speed.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims to provide a pneumatic type low-speed impact mechanism which has simple structure, is light and convenient to move, can impact at any position of a test piece and can introduce low-speed impact to the structural test site for impact test.
In order to achieve the above object, the utility model discloses a following technical scheme, a pneumatic type low-speed impact mechanism that impact test used, including the connecting cylinder, the guide rail that the tip fixedly connected with of connecting cylinder is parallel to each other, and this guide rail is perpendicular with the terminal surface of connecting cylinder, the connecting cylinder internal fixation is equipped with the cylinder, and the pneumatic action pole of this cylinder extends to the guide rail direction, and is located between the guide rail that is parallel to each other, be equipped with a hammer block along the guide rail up-and-down motion on the guide rail, the hammer block is kept away from the fixed hammer head that is equipped with of one end of cylinder, the fixed card post that is equipped with of the other end of hammer block, card post and the fixed buckle structure of establishing at pneumatic action pole tip catch or separate.
The clamping structure comprises a connecting base fixedly connected to the end of the pneumatic action rod, clamping hooks which are movably connected to the connecting base and symmetrically arranged with each other, the clamping hooks symmetrically arranged with each other are connected with each other through springs, the end of the clamping column is unfolded to form the symmetrically arranged clamping hooks which are inversely hung on the clamping hooks, and the impact hammer body is connected with the pneumatic action rod.
A sliding block is sleeved on the clamping column and moves up and down along a clamping rod of the clamping column; the hammer body of the impact hammer is connected with the guide rail through a linear bearing.
The electromagnetic suction hammer is characterized in that an electromagnet fixing base is fixedly connected to the end face, provided with one end of the guide rail, of the connecting cylinder, the end portion, far away from the connecting cylinder, of the electromagnet fixing base is fixedly connected with a suction disc type electromagnet, the suction disc type electromagnet is electrically connected with an electromagnet switch fixedly arranged on the connecting cylinder, and when the suction disc type electromagnet is powered on, the generated magnetic adsorption hammer body of the impact hammer is absorbed.
The end part of the connecting cylinder is fixedly connected with a supporting base, mutually parallel guide rails are fixedly connected onto the supporting base, one end of each guide rail, far away from the supporting base, is fixedly connected with a supporting top seat, and the supporting top seat is positioned below the hammer body of the impact hammer.
The other end of the connecting cylinder, which is opposite to the guide rail, is provided with a holding handle which is convenient to carry.
The air inlet of the air cylinder is connected with a pneumatic switch through a pipeline, and a pneumatic switch handle for starting the pneumatic switch is arranged on the pneumatic switch.
The connecting cylinder internal fixation is equipped with linear displacement sensor, has inserted the linear displacement sensor pull rod in this linear displacement sensor, and the tip of this linear displacement sensor pull rod extends outside the connecting cylinder to with the up end contact of hammer block of dashing, the motion of hammer block is followed to linear displacement sensor pull rod, just linear displacement sensor detect the displacement of linear displacement sensor pull rod removal, and pass through the displacement signal converter conversion back with the signal that detects, send the treater through the data acquisition module and carry out data processing.
The end part of the pull rod of the linear displacement sensor, which is contacted with the hammer body of the impact hammer, is fixedly connected with a tightening nut, and the tightening nut is contacted with the hammer body of the impact hammer.
And a digital display inclinometer for detecting the angle is arranged on the connecting cylinder.
The utility model has the advantages that: the impact tester is simple in structure and convenient to carry, and can ensure that the impact hammer moves along the guide post when being used on the impact tester, the installation direction of the impact tester determines the impact direction, so that impact at any angle can be realized, the upward impact and the downward impact are feasible, and an angle instrument installed on the tester can conveniently display the impact angle; the air cylinder is used as driving power, so that the impact speed can be adjusted according to the air pressure value of the control air cylinder, namely the impact energy is adjusted; one end of the hammer body of the impact hammer is fixedly provided with a clamping column, and the clamping column is hooked with or separated from a buckle structure fixedly arranged at the end part of the pneumatic action rod, so that the impact hammer can be captured when rebounding when the impact of the impact hammer is finished, and secondary re-impact of the impact hammer in the impact process can be effectively prevented; the impact hammer is connected with the linear displacement sensor, so that a displacement signal of the impact hammer in the whole impact process can be acquired, and the signal can be acquired, stored and processed through the data acquisition system, so that a speed curve in the impact process can be acquired.
Drawings
FIG. 1 is a schematic structural view of an impact tester used in the present invention;
fig. 2 is a schematic structural diagram of the present invention;
fig. 3 is a schematic view of the structure of the hook and the locking post before the experiment;
FIG. 4 is a schematic view of the fitting structure of the present invention when the locking post is separated from the locking hook;
fig. 5 is a schematic structural view of the middle impact hammer of the present invention after impact, the impact hammer body rebounds and the clamping column enters the clamping hook;
fig. 6 is a schematic structural view of the utility model with the clamping column hanging upside down in the clamping hook.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and examples.
In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature; in the description of the present invention, "a plurality" means two or more unless otherwise specified.
Examples
As shown in fig. 2, the pneumatic low-speed impact mechanism for the impact test comprises a connecting cylinder 5, wherein the end part of the connecting cylinder 5 is fixedly connected with guide rails 7 which are parallel to each other, the guide rails 7 are perpendicular to the end surface of the connecting cylinder 5, a cylinder 9 is fixedly arranged in the connecting cylinder 5, a pneumatic action rod 12 of the cylinder 9 extends towards the guide rails 7 and is positioned between the guide rails 7 which are parallel to each other, a hammer ram 13 moving up and down along the guide rails 7 is arranged on the guide rails 7, a hammer ram 14 is fixedly arranged at one end of the hammer ram 13 far away from the cylinder 9, a clamping column 27 is fixedly arranged at the other end of the hammer ram 13, and the clamping column 27 is hooked or separated from a clamping structure fixedly arranged at the end part of the pneumatic action rod 12.
In order to facilitate carrying, a holding handle 4 is arranged at the other end of the connecting cylinder opposite to the guide rail, the holding handle 4 is used for facilitating carrying of the device and simultaneously facilitating impact tests on different angles, the connecting cylinder is used as a basic device of the whole device, in order to facilitate fixing of the guide rail 7 on the connecting cylinder, a supporting base 6 is fixedly connected at the other end of the connecting cylinder opposite to the holding handle, then the guide rail 7 is fixedly connected on the supporting base 6, the guide rail 7 can be stably installed on the connecting cylinder, in order to ensure that the guide rails 7 which are parallel to each other have better integrity when in use, a supporting top seat 8 is fixedly arranged at one end of the guide rail which is far away from the supporting base 6, the supporting base 8 connects the guide rails 7 which are parallel to each other, and can effectively play a supporting role when in use, meanwhile, in order that the support base 8 does not influence the falling of the hammer body 13 of the impact hammer to impact the structural member, the support base 8 is positioned below the hammer body of the impact hammer, and meanwhile, the hammer head of the impact hammer can penetrate through the support base to impact the structural member; the hammer body 13 of the impact hammer moves up and down on the guide rail, so that the impact mechanism can be ensured to carry out impact test on structural members at any angle, and the problem that the impact test can only be carried out in the horizontal direction at present is solved.
When the impact test is needed during working, the clamping column is hooked on the buckling structure, the pneumatic action rod 12 of the air cylinder 9 is ensured to be positioned under the condition of shortening, the air cylinder 9 is driven pneumatically, the air cylinder 9 drives the pneumatic action rod, the pneumatic action rod 12 extends, when the pneumatic action rod 12 reaches the limit position, the impact hammer body 13 continues to move downwards under the action of inertia, the clamping column 27 is separated from the buckling structure, the impact hammer head 14 performs the impact test on the detected fixed structural part, after the impact occurs, the impact hammer body 13 rebounds upwards, the clamping column 27 is inversely hung on the buckling structure, and the possibility of performing secondary impact is effectively avoided.
Furthermore, in order to ensure that the hammer body of the impact hammer can be rapidly separated from the buckle structure when the pneumatic action rod 12 reaches the limit position, the impact speed in the period is ensured, and simultaneously, the clamping column can be stably hung upside down on the buckle structure in the rebounding process, so that the secondary impact is ensured not to occur,
as shown in fig. 1 and 2, the fastening structure includes a connecting base 24 fixedly connected to an end of the pneumatic actuating rod 12, hooks 25 movably connected to the connecting base 24 and symmetrically arranged with each other, the hooks 25 symmetrically arranged with each other are connected with each other through a spring 26, and an end of the clamping column 27 stretches the hooks 25 symmetrically arranged with each other to hang upside down on the hooks 25, so as to connect the hammer body 13 and the pneumatic actuating rod 12. Mutually symmetrical pothook 25 swing joint is on connecting base 24 to couple together through spring 26, can ensure that this pothook 25 carries out lock and autosegregation, barb on this pothook 25 is to corresponding reverse extension simultaneously, guarantees can be with the hammer column cap card post of card post upper end, and the column cap that can block the post simultaneously can strut the pothook when rebounding, makes it hang upside down on the pothook.
Meanwhile, in order to further ensure that the barb of the clamping column can be rapidly separated when being separated, and the separation of the barb does not need too much force, specifically, a sliding block 28 is sleeved on the clamping column 27, and the sliding block 28 moves up and down along a clamping rod of the clamping column 27; the hammer body 13 of the impact hammer is connected with the guide rail 7 through a linear bearing 15.
When in use, the clamping columns 27 are inserted into the symmetrical clamping hooks and extend to the top of the inner part of the clamping hooks, the sliding blocks 28 are positioned between the symmetrical clamping hooks to spread the symmetrically arranged clamping hooks, meanwhile, the diameter of the sliding blocks is larger than or equal to the diameter of the maximum position at the lower end of the column heads of the clamping columns 27, meanwhile, when the impact hammer body is not separated from the clamping structure, the sliding blocks and the clamping hooks are relatively static as shown in figure 3, when the pneumatic action rod is pushed by the air cylinder to reach the limit position, the pneumatic action rod stops, the clamping columns continue to descend under the action of inertia, when the clamping heads of the clamping columns move to the positions of the sliding blocks as shown in figure 4, the sliding blocks and the clamping columns are driven to descend together, the impact hammer body is separated from the clamping structure and falls freely, the impact test is carried out on the structural member by the impact hammer body, after the impact is finished, the impact hammer body rebounds, and the clamping columns on the impact hammer body enter the clamping hooks as shown in figure 5, and are barbed in the hooks as shown in fig. 6 to avoid secondary impacts.
Simultaneously in order to guarantee when the cylinder does not promote the motion of pneumatic action pole, the card post can be stable insert take the pothook of mutual symmetry, and the slider can strut the pothook of mutual symmetry, guarantee the temporary fixed stable connection of ram hammer body and pneumatic action pole fixedly connected with electro-magnet unable adjustment base 20 on the terminal surface that connecting cylinder 5 was equipped with guide rail 7 one end, the tip fixedly connected with sucking disc formula electro-magnet 21 of connecting cylinder 5 is kept away from to electro-magnet unable adjustment base 20, this sucking disc formula electro-magnet 21 is connected with the electro-magnet switch 22 electricity of fixed establishing on connecting cylinder 5, sucking disc formula electro-magnet 21 when the circular telegram, the magnetism of production adsorbs ram hammer body 13. Specifically be with the impact hammer body remove the top, the card post inserts in the pothook, simultaneously the slider strut the pothook, this moment the electromagnet switch open, sucking disc formula electro-magnet 21 circular telegram produces magnetism, adsorbs with the impact hammer pushing head, guarantees its stability, avoids the relative slider of card post to slide, avoids the slider can not with before work begins the pothook strut.
When testing, ensure the flexible speed that the cylinder drove pneumatic action pole and accord with the speed when needs assault, as figure 1 pneumatic drive structure 2 includes gas pitcher 35, establishes the air compressor 30 on gas pitcher 35, and this air compressor 30 with gas pitcher 35 intercommunication establishes the pneumatic valve 34 with gas pitcher 35 intercommunication on gas pitcher 35, pneumatic valve 34 and the pneumatic switch 10 that is equipped with on the cylinder 9 pass through the pipeline intercommunication, be equipped with pneumatic switch handle 11 on the pneumatic switch 10, still be equipped with digital display manometer 32 and the relief valve 33 that is used for detecting pressure on the gas pitcher 35, air compressor 30 on be equipped with the switch 31 of being connected with this air compressor 30 electricity. Before carrying out the impact experiment, open air compressor work through switch 31, the pneumatic valve is closed simultaneously, this air compressor is with air compression back and store to the gas pitcher in, the pressure value of gas pitcher is confirmed through the digital display manometer on the gas pitcher, guarantee simultaneously that the pressure value of this gas pitcher is greater than the pressure value of cylinder action, then the pressure of air in the adjustment gas pitcher through the relief valve, pressure value when in the gas pitcher equals with the pressure value that the cylinder used, the stop adjustment, when testing, open the pneumatic valve, open pneumatic switch through pneumatic switch handle 11 simultaneously, the air of the compressed in the gas pitcher enters into and drives the pneumatic action pole of actuating cylinder in the cylinder and extends, provide power for percussion device.
In order to facilitate detection, the displacement of the hammer body of the hammer can be detected, and data processing is facilitated, the data acquisition system 3 includes a linear displacement sensor 16 arranged in the connecting cylinder 5, a linear displacement sensor pull rod 17 with one end inserted into the linear displacement sensor 16 and the other end extending out of the connecting cylinder 5, the linear displacement sensor pull rod 17 moves in the linear displacement sensor 16, the linear displacement sensor 16 is used for detecting displacement data of the linear displacement sensor pull rod 17, a tightening nut 8 is arranged at the end of the linear displacement sensor pull rod 17 outside the connecting cylinder 5, the tightening nut 8 is in contact with the upper end face of the hammer body 13 of the hammer, the linear displacement sensor 16 is electrically connected with a displacement signal converter 19, the displacement signal converter 19 is electrically connected with a processor 37 through a data acquisition module 36, and the processor 37 converts displacement data and time data acquired by the data acquisition module 36 into instant displacement data and time data Speed. When the impact test is carried out, one end of the pull rod 17 of the linear displacement sensor is positioned in the linear displacement sensor 16 and can relatively move in the linear displacement sensor 16, so that when the hammer body of the impact hammer falls, due to the gravity condition (the condition that the nut 8 can be tightened to ensure that the pull rod 17 of the linear displacement sensor is contacted with the push head of the impact hammer), the pull rod 17 of the linear displacement sensor and the hammer body of the impact hammer fall simultaneously, the linear displacement sensor 16 detects the displacement of the pull rod 17 of the linear displacement sensor, the detected displacement is the displacement of the movement of the hammer head of the impact hammer, then the linear displacement sensor 16 converts the detected data through the displacement signal converter 19 and sends the converted data to the data acquisition module, the data acquisition module sends the received data to a processor (a computer terminal) for processing, and calculates the instantaneous speed of the hammer head of the impact hammer, the formula is an operation formula in the background art of the present application, and the common general knowledge in the technical field is not described in detail herein.
Further, in order to ensure that the angle of inclination can be measured when an inclination impact is applied, a digital inclinometer 29 for detecting the angle is provided on the connecting cylinder 5.
An impact test method of a pneumatic low-speed impact mechanism for an impact test is carried out according to the following steps:
the method comprises the following steps: the hand-held handle 4 is used for propping the impact mechanism 1 against a fixed structural part needing to be tested for impact test, and the impact tester is fixed on a test site, so that the end part of a guide rail 7 of the impact mechanism 1 is guaranteed to prop against the fixed structural part;
the electromagnet switch 21 is turned on, the sucker type electromagnet 21 is electrified to generate magnetism, meanwhile, the impact hammer body 13 moves to the uppermost end of the guide rail 7, the clamping columns 27 enter the mutually symmetrical clamping hooks 25, the mutually symmetrical clamping hooks 25 are spread by the sliding blocks 28, and the impact hammer body 13 is adsorbed by the sucker type electromagnet 21 so that the impact hammer body 13 is fixed to the uppermost end of the guide rail 7;
the switch 31 is opened, the pneumatic valve 34 is closed, the air compressor 30 works to charge the air tank 35, the pressure of the air tank detected by the digital display pressure gauge 32 is ensured to be larger than the set pressure value, the switch 31 is closed, the air pressure in the air tank 35 is adjusted through the pressure relief valve 33, and the air pressure is ensured to be the same as the set pressure value;
step two: the pneumatic valve 34 and the pneumatic switch 10 are opened, the pneumatic action rod 12 of the cylinder 9 pushes the impact hammer body 13 to move downwards, when the pneumatic action rod 12 is located at the limit position, the impact hammer body 13 continues to move downwards under the action of inertia, the clamping column 27 is withdrawn from the clamping hooks 25 which are mutually symmetrical and separated from the pneumatic action rod 12, the impact hammer body 13 continues to move downwards, the impact hammer body is impacted with a fixed structural part to be detected and rebounds, the impact hammer body 13 which rebounds ascends, and the clamping column 27 enters the clamping hooks 25 which are mutually symmetrical and is inversely hung in the clamping hooks 25;
meanwhile, in the process that the hammer ram 13 moves downwards, the linear displacement sensor pull rod 17 moves downwards along with the hammer ram 13, the linear displacement sensor 16 detects the displacement of the linear displacement sensor pull rod 17, namely the displacement of the hammer ram 13, converts the detected displacement data through the displacement signal converter 19 and then sends the converted displacement data to the data acquisition module 36, and the data acquisition module 36 sends the received data to the processor 37 for processing and calculation to obtain the instantaneous speed.
Specifically, the impact test can be divided into preparation work, impact work and data acquisition work before the test;
preparing before the test, fixing the impact mechanism 1 on a structural part to be detected, adjusting the angle of the impact mechanism 1 according to the requirement of the inclination angle, ensuring that the angle displayed by the digital display inclinometer 29 meets the required angle, then driving the pneumatic mechanism and the data acquisition system to be associated with the components on the impact mechanism, wherein the pneumatic mechanism comprises an electric connection and a pipeline, the mechanical connection is realized, after the assembly is completed, closing the pneumatic valve, opening the switch, starting the air compressor to work, storing the compressed air in the air tank, meanwhile, detecting that the pressure of the air tank is greater than the set pressure value according to the digital display pressure gauge 32, closing the switch 31, adjusting the air pressure in the air tank 35 through the pressure release valve 33, ensuring that the air pressure is the same as the set pressure value,
meanwhile, the hammer body of the impact hammer is moved upwards to enable the clamping column to be inserted into the clamping hook, meanwhile, the clamping hook is spread by the sliding block, the electromagnetic switch is turned on, the sucker type electromagnet 21 is electrified (the electromagnetic switch is connected with the sucker type electromagnet through a lead 23) to generate magnetism, the hammer body of the impact hammer is adsorbed on the sucker type electromagnet 21 to ensure that the hammer body of the impact hammer moves relatively, and an impact test is carried out after all preparation work is finished;
the impact test is carried out by opening the pneumatic valve, preferably carrying out the final preparation before the impact test, then opening a pneumatic switch through a pneumatic switch handle, feeding compressed air in an air tank into an air cylinder through a pipeline to drive a pneumatic action rod of the air cylinder to extend, driving a hammer body of a punching hammer to descend in the extension process by the pneumatic action rod, separating the hammer body of the punching hammer from a sucker type electromagnet 21, simultaneously ensuring that the descending speed of the action rod of the air cylinder is greater than the speed of a free falling body, ensuring that a sliding block is opposite to a clamping hook static device, ensuring that the clamping hook can be unfolded by the sliding block, when the pneumatic action rod extends to the limit position, continuously falling the hammer body under the action of inertia, simultaneously dropping a clamping column outwards from the clamping hook, when a clamping head of the clamping column reaches the position of the sliding block, driving the sliding block to fall together, avoiding the situation that the clamping hook clamps a main clamping column, and completely separating the hammer body from the pneumatic action rod, the impact hammer body rebounds upwards after impact, the clamping column is inserted into the clamping hook and is inversely hung in the clamping hook, and secondary impact is avoided. (the cylinder actuating rod 12 starts to move, so that the ram moves forwards along the guide rail 7 away from the electromagnet 21. when the cylinder actuating rod 12 extends to the limit position, as shown in fig. 4, the ram continues to move forwards under the inertia effect, the clamping column 27 is separated from the connecting base 24 and pulls the slide block 28 out of the clamping hook 25. as shown in fig. 5, the ram rebounds after striking the surface of the test piece, and the clamping column 27 moves into the clamping hook 25 as shown in fig. 6, at which time, the secondary impact prevention device finishes intercepting the ram).
When the impact test is carried out, the linear displacement sensor pull rod 17 and the impact hammer body fall simultaneously, the linear displacement sensor 16 detects the displacement of the linear displacement sensor pull rod 17, the detected displacement is the displacement of the movement of the impact hammer head, then the linear displacement sensor 16 converts the detected data through the displacement signal converter 19 and sends the converted data to the data acquisition module, the data acquisition module sends the received data to the processor (a computer terminal) for processing, and the instantaneous speed of the impact hammer head during impact is calculated, so that the whole impact test is completed.
The test method ensures that the drop hammer speed is realized through the drop hammer speed measuring device and the data acquisition system, and can realize accurate measurement of the impact instantaneous speed and real-time acquisition of data in the whole impact process. The impact hammer moves along the guide post, and the installation direction of the impact testing machine determines the impact direction, so that impact at any angle can be realized, the upward impact and the downward impact are feasible, and an angle instrument arranged on the testing machine can conveniently display the impact angle; the impact speed, namely the impact energy, is adjusted by controlling the pressure value of the air storage tank.
The above embodiments are merely examples of the present invention, and do not limit the protection scope of the present invention, and all designs the same as or similar to the present invention belong to the protection scope of the present invention.
Claims (10)
1. A pneumatic low-speed impact mechanism for impact test is characterized by comprising a connecting cylinder (5), the end part of the connecting cylinder (5) is fixedly connected with guide rails (7) which are parallel to each other, the guide rail (7) is vertical to the end surface of the connecting cylinder (5), a cylinder (9) is fixedly arranged in the connecting cylinder (5), the pneumatic action rod (12) of the air cylinder (9) extends towards the guide rail (7), and are positioned between the guide rails (7) which are parallel to each other, a hammer body (13) of the impact hammer which moves up and down along the guide rails (7) is arranged on the guide rails (7), one end of the impact hammer body (13) far away from the cylinder (9) is fixedly provided with an impact hammer head (14), the other end of the hammer body (13) of the impact hammer is fixedly provided with a clamping column (27), and the clamping column (27) is hooked or separated with a buckling structure fixedly arranged at the end part of the pneumatic action rod (12).
2. The pneumatic low-speed impact mechanism for the impact test according to claim 1, wherein the snap structure comprises a connecting base (24) fixedly connected to the end of the pneumatic action rod (12), hooks (25) movably connected to the connecting base (24) and symmetrically arranged with each other, the hooks (25) symmetrically arranged with each other are connected through a spring (26), the end of the clamping column (27) opens the hooks (25) symmetrically arranged with each other and hangs upside down on the hooks (25), and the hammer body (13) of the impact hammer is connected with the pneumatic action rod (12).
3. The pneumatic low-speed impact mechanism for the impact test is characterized in that a slide block (28) is sleeved on the clamping column (27), and the slide block (28) moves up and down along a clamping rod of the clamping column (27); the hammer body (13) of the impact hammer is connected with the guide rail (7) through a linear bearing (15).
4. The pneumatic low-speed impact mechanism for the impact test according to claim 3, wherein the end face of the connecting cylinder (5) provided with one end of the guide rail (7) is fixedly connected with an electromagnet fixing base (20), the end part of the electromagnet fixing base (20) far away from the connecting cylinder (5) is fixedly connected with a sucker type electromagnet (21), the sucker type electromagnet (21) is electrically connected with an electromagnet switch (22) fixedly arranged on the connecting cylinder (5), and the sucker type electromagnet (21) generates magnetic adsorption impact hammer body (13) when being electrified.
5. The pneumatic low-speed impact mechanism for the impact test is characterized in that a supporting base (6) is fixedly connected to the end of the connecting cylinder (5), mutually parallel guide rails (7) are fixedly connected to the supporting base (6), a supporting top seat (8) is fixedly connected to one end, far away from the supporting base (6), of the guide rails (7), and the supporting top seat (8) is located below the hammer body (13) of the impact hammer.
6. The pneumatic low-speed impact mechanism for the impact test according to claim 1, characterized in that the other end of the connecting cylinder (5) opposite to the guide rail (7) is provided with a portable holding handle (4).
7. The pneumatic low-speed impact mechanism for the impact test according to claim 1, wherein the air inlet of the air cylinder (9) is connected with a pneumatic switch (10) through a pipeline, and a pneumatic switch handle for opening the pneumatic switch is arranged on the pneumatic switch (10).
8. The pneumatic low-speed impact mechanism for the impact test is characterized in that a linear displacement sensor (16) is fixedly arranged in the connecting cylinder (5), a linear displacement sensor pull rod (17) is inserted into the linear displacement sensor (16), the end part of the linear displacement sensor pull rod (17) extends out of the connecting cylinder (5) and is in contact with the upper end face of the hammer body (13), the linear displacement sensor pull rod (17) moves along with the hammer body (13), the linear displacement sensor (16) detects the displacement of the linear displacement sensor pull rod (17), the detected signal is converted by a displacement signal converter (19), and the converted signal is sent to a processor (37) through a data acquisition module (36) for data processing.
9. The pneumatic low-speed impact mechanism for the impact test according to claim 8, wherein a backup nut (18) is fixedly connected to the end of the linear displacement sensor pull rod (17) contacting with the hammer body (13), and the backup nut (18) contacts with the hammer body (13).
10. The pneumatic low-speed impact mechanism for the impact test according to claim 1, characterized in that a digital display inclinometer (29) for detecting the angle is arranged on the connecting cylinder (5).
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| CN201921062785.XU CN210376021U (en) | 2019-07-08 | 2019-07-08 | Pneumatic type low-speed impact mechanism for impact test |
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| CN201921062785.XU CN210376021U (en) | 2019-07-08 | 2019-07-08 | Pneumatic type low-speed impact mechanism for impact test |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261244A (en) * | 2019-07-08 | 2019-09-20 | 西安天金检测技术有限公司 | A kind of pneumatic type low velocity impact mechanism of impact test |
| CN114166559A (en) * | 2021-12-09 | 2022-03-11 | 内蒙古工业大学 | Electric rotary sampler for geological exploration |
| CN117804943A (en) * | 2024-02-29 | 2024-04-02 | 湖南百舸水利建设股份有限公司 | Cement soil penetration test method and detection device thereof |
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2019
- 2019-07-08 CN CN201921062785.XU patent/CN210376021U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110261244A (en) * | 2019-07-08 | 2019-09-20 | 西安天金检测技术有限公司 | A kind of pneumatic type low velocity impact mechanism of impact test |
| CN114166559A (en) * | 2021-12-09 | 2022-03-11 | 内蒙古工业大学 | Electric rotary sampler for geological exploration |
| CN114166559B (en) * | 2021-12-09 | 2024-01-23 | 内蒙古工业大学 | Electric rotary sampler for geological exploration |
| CN117804943A (en) * | 2024-02-29 | 2024-04-02 | 湖南百舸水利建设股份有限公司 | Cement soil penetration test method and detection device thereof |
| CN117804943B (en) * | 2024-02-29 | 2024-05-10 | 湖南百舸水利建设股份有限公司 | Cement soil penetration test method and detection device thereof |
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